如何在Mac OS上更新Python并让RubyGems使用新版本？

Question

I am having serious issues trying to download the "therubyracer" gem. I think the problem is that I do not have a working libv8 library to create the gem.

I think I do not have a working libv8 because my RubyGems keeps trying to use "Python 2.5.6", which is too old to gem install libv8 . I tried countless ways to update the Python that RubyGems uses, however, I cannot figure it out.

Here is what I have done thus far. I went to http://www.python.org/download/releases/3.3.2/ and downloaded "(Mac OS X 64-bit/32-bit Installer (3.3.2) for Mac OS X 10.6 and later 2.)".

Upon completion of the download, I ran:

gem install libv8 --version 3.11.8.17

Yet, I still received the same error. I noticed the output still said:

"Using Python 2.5.4"

Despite downloading a newer Python version, it is not being used. So how do I change the version of Python that the "gem" command uses? I searched and discovered "virtualenv," which appears to be a good Python manager, however I am a bit at a dead end now. Any help or suggestion?

Answer 1

If libv8 uses the python command from the command line, this should apply:

If you do not care what python2 is installed, you can do this in the command line:

type python # this gives you the path of the python command
python is /usr/bin/python
type python2.7
python is /usr/bin/python2.7

Then you can copy one over the other

cp /usr/bin/python2.7 /usr/bin/python

You can safely copy python2.7 there because it is compatible with older versions.

Suggestions?